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Navegação por Revista "Brazilian Dental Journal"
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ANA, P.A.
; VELOSO JUNIOR, W.F.; CLAUDIO, T.; ZEZELL, D.M.
.
3D-Finite element and thermographic analysis of human teeth irradiated with ErCrYSGG.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 99-99,
2004.
Abstract:
The purpose of this study was to analyse surface and pulpal temperature
changes in extracted human teeth subjected to
Er,Cr:YSGG laser irradiation by using Finite Element Method
(FEM) and comparing with thermal analysis made by thermocouple
and thermocamera. Twelve extracted human molar teeth
were selected and divided into three groups, according to the following
Er,Cr:YSGG laser irradiation conditions: 2.8 J/cm2, 5.6
J/cm2 and 8.5 J/cm2. During laser irradiation, surface temperature
was measured using a thermocamera (FLIR Systems - USA)
and the pulpal temperature was monitored by means of a thermocouple
type T placed in the pulpal chamber. For FEM analysis, it
were constructed numerical models that reproduced a typical
sound molar teeth and the analysis simulated the absorption of the
laser energy and the heat transfer through the tooth in three
dimensions, considering the same laser energy and conditions
performed in thermocouple and thermocamera measurements.
The results showed that theoretical FEM calculation showed
good agreement with the thermocamera and thermocouple
obtained data, simulating heat transfer and predicting the temperature
increase. It was possible to conclude that 3D Finite Element
Method gives good results that makes possible to understand the
thermal behavior of dental material.
Palavras-Chave:
teeth;
finite element method;
thermography;
laser radiation
ANA, P.A.; VELOSO JUNIOR, W.F.; CLAUDIO, T.; ZEZELL, D.M.
3D-Finite element and thermographic analysis of human teeth irradiated with ErCrYSGG.
Brazilian Dental Journal,
v. 15,
p. 99-99,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32746. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
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YAMADA JUNIOR, A.M.
; HAYEK, R.R.A.; GIOSO, M.A.; FERREIRA, J.; BATISTA SOBRINHO, C.A.; RIBEIRO, M.S.
.
Bacterial reduction by photodynamic therapy in peri-implantitis: an in vivo study.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 84-84,
2004.
Abstract:
Progressive peri-implantar bone losses, which are accompanied by
inflammatory process in the soft tissues is referred to as peri-implantitis.
The aim of this study was to compare the effects of lethal photosensitization
with the conventional technique on bacterial reduction
in ligature induced peri-implantitis in dogs. Seventeen third premolars
of eight Labrador dogs were extracted and, immediately after,
the implants were submerged. After osseointegration, peri-implantitis
was induced. After 4 months, ligature were removed and the same
period was waited for natural induction of bacterial plaque. The dogs
were randomly divided into two groups. In the conventional group,
they were treated with the conventional techniques of mucoperiosteal
flaps for scaling the implant surface and irrigation with
chlorexidine. In the laser group, only mucoperiosteal scaling was
carried out before photodynamic therapy. On the peri-implantar
pocket an azulene paste was introduced and a GaAlAs low-power
laser (l= 660 nm, P= 30 mW, E= 5,4 J and Dt= 3 min.) was applied.
Microbiological samples were obtained before and immediately
after treatment. The results of this study showed that Prevotella sp.,
Fusobacterium e S. Beta-haemolyticus were significantly reduced
for the conventional and laser groups (100%,99.8%; 100%,100%;
85.7%,97.6%, respectively).
Palavras-Chave:
dentistry;
teeth;
implants;
bone tissues;
bacteria;
photodynamic therapy;
lasers;
photosensitivity
YAMADA JUNIOR, A.M.; HAYEK, R.R.A.; GIOSO, M.A.; FERREIRA, J.; BATISTA SOBRINHO, C.A.; RIBEIRO, M.S.
Bacterial reduction by photodynamic therapy in peri-implantitis: an in vivo study.
Brazilian Dental Journal,
v. 15,
p. 84-84,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32755. Acesso em: $DATA.
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ANDRADE, A.K.P.; FEIST, I.S.; CAI, S.; PANNUTI, C.; ZEZELL, D.M.
; DE MICHELI, G..
Bacterial reduction in class II furcation after root debridment with or without Nd:YAG laser irradiation.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 90-91,
2004.
Abstract:
The use of Nd:Yag laser for bacterial reduction as an adjuvant to
nonsurgical periodontal treatment has been approached in several
studies. Furcation complex anatomy is responsible for comprised
treatment results in this areas due to the lack of proper
access for instrumentation showing the persistence of a pathogenic
microbial flora. The purpose of this clinical trial, randomized,
double-blinded was to evaluated the bacterial reduction achieved
with the Nd:YAG associated to conventional treatment on furcation
sites of patients with chronic periodontitis. In a split mouth
design study, 34 class II furcations that were selected from 17
patients with chronic periodontitis. They received previous full
mouth periodontal treatment, except for the experimental sites.
The 17 furcations of the Control group underwent twice manual
and ultrasonic root debridment in weekly intervals. The Test
group received the same treatment as the Control group followed
by the Nd:YAG laser application (100mJ/pulse; 1.5W; 15Hz;
60sec). The microbiological parameters total numbers of anaerobic
Colony Forming Units(CFU); Black pigmented CFU and the
level of Actinobacillus actinomycetemcomitans(Aa), Porphyromonas
gingivalis (Pg) and Prevotella intermedia(Pi) were determined
at baseline, immediatly and one month after the treatment.
The results showed a significant reduction of total CFU for both
groups immediately after the treatment, but it was better for the
Test group. After one month the total CFU average increased but was still below pretreatment levels for both groups. The black
pigmented CFU and the level of Aa, Pg e Pi decreased significantly
after the treatment but 30 days after there was an increase
almost equal to baseline levels for both groups. The Nd:Yag laser
associated with convencional treatment promoted bacterial
reduction on class II furcation immediately after its application.
Palavras-Chave:
bacteria;
laser radiation;
lasers;
clinical trials
ANDRADE, A.K.P.; FEIST, I.S.; CAI, S.; PANNUTI, C.; ZEZELL, D.M.; DE MICHELI, G.
Bacterial reduction in class II furcation after root debridment with or without Nd:YAG laser irradiation.
Brazilian Dental Journal,
v. 15,
p. 90-91,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32740. Acesso em: $DATA.
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KOGLER, V.L.; MAIO, M.; LAGE-MARQUES, J.L.; ZEZELL, D.M.
.
Carbon dioxide laser or cold scalpel on the removal of gingival melanin pigmentation: comparative study.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 90-90,
2004.
Abstract:
Melanin pigmentation is the result of melanin granules produced
by melanocytes present in the basal layer of the oral epithelium.
Gingival physiological melanin pigmentation is symmetric and
persistent, may cause esthetic problems especially in individuals
with a gummy smile. Various techniques have been described for
the removal of melanin pigmentation from the gingival epithelium
and partial thin connective tissue, as chemical agents,
cryosurgery, surgery and gingival grafts. Recently, lasers systems
have been used to coagulate and vaporize cells, promoting controlled
gingival ablation. This study compares clinical efficiency to removal gingival melanin pigmentation in 20 patients with
dioxide carbon laser, and 20 patients with cold scalpel during 30
days after surgery. A dioxide carbon laser (output = 5W; superpulse
= 0,5s; spot size = 2,5mm defocused; focal distance =
5,5cm, Intensity = 102 W/cm2) was irradiated on gingival mucosal
surface. Both techniques presented epithelialization in 15 days.
Both systems are considered effective for removal melanin pigments.
Patient's evaluation with postoperative pain found the carbon
dioxide laser technique superior to the cold scalpel one. After
30 days, the repigmentation occured in 45% of the dioxide carbon
laser patients, and 80% of the cold scalpel patients.
Palavras-Chave:
carbon dioxide lasers;
melanin;
pigments;
lasers
KOGLER, V.L.; MAIO, M.; LAGE-MARQUES, J.L.; ZEZELL, D.M.
Carbon dioxide laser or cold scalpel on the removal of gingival melanin pigmentation: comparative study.
Brazilian Dental Journal,
v. 15,
p. 90-90,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32739. Acesso em: $DATA.
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SUZUKI, L.C.; YAMADA JUNIOR, A.M.
; HAYEK, R.R.A.; RIBEIRO, M.S.
.
A case report of photodynamic therapy on bacterial reduction before immediate implant.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 127-127,
2004.
Abstract:
Recent studies have demonstrated that a number of oral bacteria can
be killed by photodynamic therapy with low concentrations of dyes.
Photodynamic therapy is the combination of light with appropriate
wavelength and a photosensitizer. The antimicrobial activity is mainly
mediated by singlet oxygen and/or free radicals generated by the
photoactivated sensitizer. A flap surgery aiming an immediate
implant was made in a residual root with periodontal lesion on upper
first premolar. After the extraction, a microbiological sample with
sterile paper points was harvested. Then, the photosensitizer was
applied in the infected alveolus and irradiated with low-intensity
laser, ?= 660 nm, P= 30 mW and E= 9 J . After the photodynamic
therapy, a new microbiological sample was harvested. Subsequently,
it was prepared the implant bed with conical burs and then the
implant was placed. Patient was medicated with antibiotic after surgery.
The microbiological analysis showed a significant reduction of
Prevotella sp., Fusobacterium sp. and Streptococcus beta-hemoliticus.
This finding suggests that photodynamic therapy is an alternative
method to disinfect alveolus before implant placement. Therefore,
this study highlights the need for future work in the area of photodynamic
therapy to reduce bacteria without harming host tissue.
SUZUKI, L.C.; YAMADA JUNIOR, A.M.; HAYEK, R.R.A.; RIBEIRO, M.S.
A case report of photodynamic therapy on bacterial reduction before immediate implant.
Brazilian Dental Journal,
v. 15,
p. 127-127,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32767. Acesso em: $DATA.
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PAIVA, P.F.; PAIVA, G.; NASR, M.K.; NUNES, L.J.; MOREIRA, L.A.; ZEZELL, D.M.
.
Cavity preparation with ER:YAG laser: pain evaluation.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 94-94,
2004.
Abstract:
They were selected for this work clinic patient of the which were
selected 15 teeth with decay lesion, being ten teeth with lesion type
class I, of these five for the group-control with high conventional
rotation, and five for the group laser class I, and five teeth with
lesion type class Vfor the group laser. In the preparations with laser
of Er:YAG (Kavo Key Laser 2), any patient do not was anesthetized,
even in the deepest cavities, and the maximum degree of
pain (that varied from 0 to 10) it was of 4. In the group-control,
with mounted tip in high conventional rotation, two patients were
anesthetized, and the maximum degree of pain was of 7.
The use of the laser in the dental clinic (restorative dentistry),
using the technology laser in the dental preparations, it showed to
be a good alternative to the use of the mounted tip in high conventional
rotation.
94
Palavras-Chave:
dentin;
teeth;
oral cavity;
lasers;
biological recovery;
pain
PAIVA, P.F.; PAIVA, G.; NASR, M.K.; NUNES, L.J.; MOREIRA, L.A.; ZEZELL, D.M.
Cavity preparation with ER:YAG laser: pain evaluation.
Brazilian Dental Journal,
v. 15,
p. 94-94,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32743. Acesso em: $DATA.
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BACHMANN, L.
; DIEBOLDER, R.; HIBST, R.; ZEZELL, D.M.
.
Changes in chemical composition and collagen structure of dentin tissue after erbium laser irradiation.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 78-78,
2004.
Abstract:
The erbium laser light has a great affinity to the water molecule,
which is present in great quantity in biological hard tissues. The
objective of this work is to identify chemical changes by infrared
spectroscopy of irradiated dentin by an Er:YAG - 2.94μm laser.
The irradiation was performed with fluences between 0.365
J/cm2 and 1.94 J/cm2. For the infrared analysis a Fourier transform
infrared spectrometer was used. After the irradiation were
observed: loss of water, alteration of the structure and composition
of the collagen and increase of the OH- radical. These alterations
can be identified by a decrease of the water and OH- band between 3800-2800 cm-1, bands ascribed to collagen structure
between 1400-1100 cm-1. The results show that the erbium laser
changes the structure and composition of the organic matrix, OHradical
and the water composition in the irradiated dentin.
Palavras-Chave:
dentin;
bone tissues;
teeth;
erbium;
lasers
BACHMANN, L.; DIEBOLDER, R.; HIBST, R.; ZEZELL, D.M.
Changes in chemical composition and collagen structure of dentin tissue after erbium laser irradiation.
Brazilian Dental Journal,
v. 15,
p. 78-78,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32734. Acesso em: $DATA.
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EDUARDO, P.L.P.; BACHMANN, L.
; SALVADOR, V.L.; ZEZELL, D.M.
.
Chemical Modification of bovine dental enamel irradiated with holmiun laser.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 106-106,
2004.
Abstract:
This study investigated Ho:YLF (2,065 mm) effects on dental
enamel with regards to the thermal variations in the pulp chamber
during irradiation and resistance to demineralization. Twenty
samples of bovine enamel were divided: 1) control- acidulated
phosphate fluoride (APF) topic application followed by demineralization
treatment with lactic acid; 2) Ho:YLF irradiation
(100J/cm2) followed by APF and demineralization; 3) Ho:YLF
irradiation (350J/cm2) followed by APF and demineralization; 4)
Ho:YLF irradiation (450J/cm2) followed by APF and demineralization.
All samples were quantified according to their calcium
and phosphorous atoms relative concentrations before and after
the treatments. X-Ray fluorescence spectrochemical analysis
showed an increase on the calcium and phosphorous atoms concentration
ratio and therefore the enamel demineralization reduction
as a result of the lactic acid treatment in the samples irradiated with the holmium laser followed by the APF (ANOVA, Tukey
p<0,01). To evaluate the feasibility of this study for clinical purposes,
surfaces morphology were analyzed. Modifications were
characterized by melted and re-solidified regions of the enamel,
which can changes its permeability and solubility. Temperature
changes of ten human pre-molars teeth irradiated with 350 J/cm2
and 450 J/cm2 were also monitored in the pulp chamber in real
time. Temperature increases were limited to 4,2° C.
Palavras-Chave:
teeth;
dentin;
animals;
cattle;
enamels;
laser radiation;
holmium;
chemical composition
EDUARDO, P.L.P.; BACHMANN, L.; SALVADOR, V.L.; ZEZELL, D.M.
Chemical Modification of bovine dental enamel irradiated with holmiun laser.
Brazilian Dental Journal,
v. 15,
p. 106-106,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32747. Acesso em: $DATA.
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HAYEK, R.R.A.; YAMADA JUNIOR, A.M.
; GARCEZ, A.S.; NUNEZ, S.C.
; SUZUKI, L.C.; RIBEIRO, M.S.
.
Comparation between photodynamic therapy and a bactericidal solution in the treatment of dental alveolitis microbiological evaluation.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 110-110,
2004.
Abstract:
Photodynamic therapy is a new therapeutic modality to treat
microbial infections. The aim of this pilot study was to compare
this new therapeutic approach with clorhexidine in mini pigs
induced alveolitis. Alveolitis is an inflammatory disease that
involves the superficial bone layer in the dental alveolus. Eight
dental elements were extracted from mini pigs and immediately
after the alveolus were contaminated with Streptoccocus aureus.
After seven days the area presented edema and hyperemia. In the
clorhexidine group the alveolus were debrided and irrigated with a
0.12% solution of clorhexidine. In Laser group the alveolus were
debrided and photodynamic therapy was performed consisting in
the application of a azulene paste inside the alveolus with a preirradiation
time of 5 minutes followed by irradiation with a low
power diode laser, ?= 685 nm, P= 50 mW, E= 9 J, for 3 minutes.
Microbiological samples were harvested before and after treatment
for both groups with sterile paper points. The results showed bacterial
reduction in both groups, although photodynamic therapy
was significantly more effective to reduce the population of S.
aureus. This finding indicates that photodynamic therapy can be an
alternative method to the treatment of alveolitis.
Palavras-Chave:
dentistry;
photodynamic therapy;
germicides;
inflammation
HAYEK, R.R.A.; YAMADA JUNIOR, A.M.; GARCEZ, A.S.; NUNEZ, S.C.; SUZUKI, L.C.; RIBEIRO, M.S.
Comparation between photodynamic therapy and a bactericidal solution in the treatment of dental alveolitis microbiological evaluation.
Brazilian Dental Journal,
v. 15,
p. 110-110,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32752. Acesso em: $DATA.
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NUNEZ, S.C.
; GOMES, L.; GARCEZ, A.S.; LAGE-MARQUES, J.L..
Comparative study between photodynamic therapy and chemical solution on bacterial reduction in root canals.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 85-85,
2004.
Abstract:
One of the major medical problems facing mankind in the next
century will be the resistance of many pathogenic microbes to
existing antibiotics. Oral bacteria can easily reach other body sites
and also spread to other individuals. Therefore, antibiotic-resistant
oral bacteria have the opportunity for rapid dissemination through
the community and to transfer their resistance genes to other bacterial
species. Photodynamic therapy involves the use of light-activated
drugs which may offer an alternative approach to the use of
traditional antimicrobial agents. The purpose of this study was to
evaluate bacterial reduction in infected root canal. Thirty teeth
with their root canals prepared were contaminated with
Enterococcus faecalis. Control group was untreated. Chemical
group was treated with sodium hypochlorite for 30 minutes and in
the laser group, a photosensitizer paste was placed and maintained
in the root canals for 5 minutes and irradiated with a diode laser,
output power 10 mW and l= 685nm for 3 minutes. The bacterial
reduction was significantly higher for laser group when compared to chemical and control groups. These results indicate photodynamic
therapy as an effective method to kill E. faecalis.
Palavras-Chave:
photodynamic therapy;
oral cavity;
teeth;
antimicrobial agents;
microbial drug resistance
NUNEZ, S.C.; GOMES, L.; GARCEZ, A.S.; LAGE-MARQUES, J.L.
Comparative study between photodynamic therapy and chemical solution on bacterial reduction in root canals.
Brazilian Dental Journal,
v. 15,
p. 85-85,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32757. Acesso em: $DATA.
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-
BARROSO, M.C.S.; WETTER, N.U.
; PELINO, J.E.P..
Dental bleaching efficacy with diode laser and LED irradiation: an in vitro study.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 77-77,
2004.
Abstract:
Objective: This in vitro study evaluated the whitening efficacy of
LED and diode laser irradiation during the dental bleaching procedure,
using the two agents Opalescence X-tra and HP Whiteness.
Background: Bleaching techniques achieved significant advances
with the use of coherent or incoherent radiation sources to activate the
bleaching chemicals. Methods: Atotal of 60 bovine incisors were randomly
divided into six groups, three for each bleaching agent, receiving
1) only agent, 2) agent and LED irradiation at wavelength of 470
nm, 3) agent and 1.6 watt diode Laser at 808 nm. The results of the
irradiations were characterized with the CIELAB system by measuring
the L*a*b* values for the teeth before and after bleaching.
Results: The average increase of the lightness value (CIELAB L*) of
the different groups was 3-7 and the average chroma value decreased
by 5-9. Conclusions: This is to our knowledge the first time that the
light sources Laser and LED are compared with respect to their
whitening capability when applied to different agents. Best overall
results are obtained with the Whiteness HP and Laser association.
Palavras-Chave:
teeth;
bleaching;
enamels;
semiconductor lasers;
light emitting diodes
BARROSO, M.C.S.; WETTER, N.U.; PELINO, J.E.P.
Dental bleaching efficacy with diode laser and LED irradiation: an in vitro study.
Brazilian Dental Journal,
v. 15,
p. 77-77,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32753. Acesso em: $DATA.
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THEODORO, L.H.; GARCIA, V.G.; ZEZELL, D.M.
; HAYPEK, P.; BACHMANN, L.
; SAMPAIO, J.E.C..
Effect of Er:YAG and diode lasers in the adhesion of blood components and in the morphology of irradiated root surfaces.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 89-89,
2004.
Abstract:
The aim of this study was to evaluate in vitro the adhesion of
blood components on root surfaces irradiated with Er:YAG
(2.94??m) and GaAlAs Diode (808 nm) lasers and these effects
on irradiated root surfaces. It was obtained 100 samples of
human teeth. They were scaled and divided into five groups of 20
samples each: G1 (Control); G2 -Er:YAG laser (7.6 J/cm2); G3 - Er:YAG laser (12.9 J/cm2); G4 -Diode laser (90 J/cm2) and G5 -
Diode laser (108 J/cm2). After these treatments were conducted,
10 samples of each group received a blood tissue, and the reminiscent
10 samples did not receive such treatment. After laboratorial
treatments the samples were analysed by scanning electron
microscopy. The results have shown that there were no significant
differences between the Control Group and the groups treated
with Er:YAG laser (p=0,9633 and 0,6229); G4 and G5 were
less effective than the Control Group and the Er:YAG laser
groups (p<0,01). No proposed treatment increased the adhesion
of blood components in a significant way when compared to the
Control Group; although the Er:YAG laser did not interfere in the
adhesion of blood components it caused
more changes on the root surface, while the Diode laser inhibited
the adhesion.
Palavras-Chave:
teeth;
blood;
fibrin;
lasers;
erbium;
in vitro;
morphological changes
THEODORO, L.H.; GARCIA, V.G.; ZEZELL, D.M.; HAYPEK, P.; BACHMANN, L.; SAMPAIO, J.E.C.
Effect of Er:YAG and diode lasers in the adhesion of blood components and in the morphology of irradiated root surfaces.
Brazilian Dental Journal,
v. 15,
p. 89-89,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32737. Acesso em: $DATA.
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-
KOHARA, E.K.
; KATO, I.T.; WETTER, N.U.
.
Effects of 960nm diode laser irradiation and fluoride on calcium solubility of dental enamel in vitro.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 112-112,
2004.
Abstract:
The aim of this study is to determine the effects of diode laser
(?=960 nm) irradiation on calcium solubility of dental enamel.
Sixty enamel specimens were prepared from human teeth and
divided into four groups (control, fluoride, laser and fluoride plus
laser). Prior to the irradiation a vegetable coal diluted in physiological
solution was applied to the enamel surface and the specimens
were irradiated using 6,5 W of peak power, 5 ms of pulse
duration, 10 Hz of repetition rate, fluency of 3,7 J/cm2 and time
exposure of 10 seconds. The acidulated phosphate fluoride was
applied for 4 minutes. Next, the specimens were immersed in lactic
acid for 24 hours at 37 °C. The calcium content in demineralization
solution was evaluated with Inductively Coupled Plasma
Atomic Emission Spectrometry. The results indicate an increase in calcium solubility (12%) after laser irradiation, however, not
statistically significant. When associated with fluoride, the
decrease in calcium solubility did not differ from the results
obtained with fluoride only. It can be concluded that in this experiment
diode laser irradiation did not increase acid resistance of
dental enamel.
KOHARA, E.K.; KATO, I.T.; WETTER, N.U.
Effects of 960nm diode laser irradiation and fluoride on calcium solubility of dental enamel in vitro.
Brazilian Dental Journal,
v. 15,
p. 112-112,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32763. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
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ANA, P.A.
; ROCHA, R.M.M.; BLAY, A.; AUN, C.E.; LAGE-MARQUES, J.L.; ZEZELL, D.M.
.
Effects of Er, Cr:YSGG Laser irradiation on endodontics system permeability.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 99-99,
2004.
Abstract:
The aim of this study was to evaluate the effects of Er,Cr:YSGG
laser irradiation on root dentin permeability. Twenty extracted
single-rooted teeth were instrumented with K-files and divided in
four groups, according to laser fluences: GI (non-irradiated), GII
(12.5 mJ/pulse; 2.8 J/cm2), GIII (25 mJ/pulse; 8.5 J/cm2) and
GIV (75 mJ/pulse; 16.98 J/cm2). Lased groups had an association
of irrigating solution EDTA-T and Er,Cr:YSGG laser irradiation,
which was performed at 20 Hz repetition rate without airwater
spray, with four helicoidal movements during approximately
5 seconds. NDP associated with rhodamine B dye was
used to evaluate dentin permeability. After the experimental period,
the samples were transversely cut into six 2.0 mm thick slices
for subsequent reading using the ImageLab software. The results
showed that dentin permeability of root canals was decreased
when exposed to Er,Cr:YSGG laser irradiation compared with
non-irradiated samples, and this alteration was higher when higher
fluences were applied. The cervical and middle thirds had permeability
values statistically similar (p > 0.05) and significantly
greater than the apical third. It can be concluded that the use of
Er,Cr:YSGG laser irradiation at the utilized parameters decreases
dentin permeability, favoring the root canal sealing.
Palavras-Chave:
dentin;
laser radiation;
permeability
ANA, P.A.; ROCHA, R.M.M.; BLAY, A.; AUN, C.E.; LAGE-MARQUES, J.L.; ZEZELL, D.M.
Effects of Er, Cr:YSGG Laser irradiation on endodontics system permeability.
Brazilian Dental Journal,
v. 15,
p. 99-99,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32745. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
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-
EDUARDO, F.P.; NICOLLI FILHO, W.; MIGLIORATI, C.A.; ZEZELL, D.M.
; EDUARDO, C.P.; SCHUBERT, M.M..
Effects of low intensity laser radiation in the prevention of oral mucositis in patients undergoing bone marrow transplant.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 97-97,
2004.
Abstract:
Oral mucositis is one of the complications arising from pre bone marrow
transplant conditioning, which can substantially change the patient's quality
of life. The purpose of this randomized double blind study was to compare
the effects of low intensity laser radiation in the prevention of oral
mucositis in patients undergoing bone marrow transplants. Seventy
patients at the Seattle Cancer Care Alliance in the U.S.A. were approved
by the local ethics committee and gave their informed consent to take part
in the study. The 70 patients were divided into three groups (group 1 -
laser 650nm; group 2 - laser 780nm and group 3 placebo). The therapy or
placebo treatment began on the first day of the conditioning and continued
through to two days following the bone marrow transplant. Mucositis
was measured according to the oral mucositis rate and the pain assessment
rate (VAS). We were thus able to conclude that the diode 650nm
laser indeed decreased the severity of oral mucositis as well as the degree
the pain when used as a preventative therapy in patients undergoing bone
marrow transplants. In this study, low intensity laser therapy was regarded
as safe and did not present any side effects.
Palavras-Chave:
low dose irradiation;
oral cavity;
mucous membranes;
lasers;
semiconductor diodes;
transplants;
bone marrow
EDUARDO, F.P.; NICOLLI FILHO, W.; MIGLIORATI, C.A.; ZEZELL, D.M.; EDUARDO, C.P.; SCHUBERT, M.M.
Effects of low intensity laser radiation in the prevention of oral mucositis in patients undergoing bone marrow transplant.
Brazilian Dental Journal,
v. 15,
p. 97-97,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32744. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
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-
KOHARA, E.K.
; CRUZ, D.R.; WETTER, N.U.
; RIBEIRO, M.S.
.
Effects of low-intensity laser therapy on the Orthodontic movement velocity of human teeth: a clinical study.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 84-84,
2004.
Abstract:
Low-intensity laser therapy (LILT) has been studied in many
fields of Dentistry, but, to our knowledge, it is the first time that
its effects on orthodontic movement velocity in humans are
investigated. In our study, eleven patients were recruited for a
two-month study. One half of the upper arcade was considered
control group and received mechanical activation of the canine
teeth every thirty days. The opposite half received the same
mechanical activation and was also irradiated with a diode laser
(?=780nm) on ten points around the root, during 10s with 20
mW, 5 J/cm2, on four days of each month. Data of the biometrical
progress of both groups were statistically compared. All
patients showed significant higher retraction velocity of the
canines on the laser treated side when compared to the control.
Conclusion: Our findings suggest that LILT does accelerate human teeth movement and could therefore considerably shorten
the whole treatment duration.
Palavras-Chave:
teeth;
orthodontic treatments;
semiconductor lasers;
light emitting diodes;
therapy;
bone tissues
KOHARA, E.K.; CRUZ, D.R.; WETTER, N.U.; RIBEIRO, M.S.
Effects of low-intensity laser therapy on the Orthodontic movement velocity of human teeth: a clinical study.
Brazilian Dental Journal,
v. 15,
p. 84-84,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32754. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
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-
GODOY, B.M.; ARANA-CHAVEZ, V.E.; BORTOLI GROTH, E.B.; RIBEIRO, M.S.
.
Effects of low-intensity red laser radiation on the dentine-pulp interface after class I cavity preparation disfunction.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 86-87,
2004.
Abstract:
The aim of this study was to investigate the effects of low-intensity
red laser radiation on the ultrastructure of dentine-pulp interface
after conventionally prepared class I cavity preparation.
Eight premolars indicated for extraction for orthodontic reasons
from 2 patients were used. Class I cavities were prepared and the
teeth were divided into two groups. The first group received a
treatment with a GaAlAs laser, l= 660 nm, P= 30 mW and D=
2J/cm2. The laser tip was applied directly and perpendicularly
into the cavity in only one sense. The teeth from the second group
had their class I cavities prepared but they did not receive the
laser therapy. All cavities were filled with composite resin.
Twenty-eight days after the preparation, the teeth were extracted
and processed for transmission electron microscopy analysis.
Two sound teeth (healthy group) without any preparation were
also examined. The first group presented odontoblastic processes in intimate contact with the extracellular matrix, while the collagen
fibers appeared more aggregated and organized than those of
the second group. These results were also observed in the healthy
teeth. The results suggest that laser irradiation accelerates the
recovery of the structures at the dentine-pulp interface involved
during cavity preparation layer.
Palavras-Chave:
teeth;
dentin;
oral cavity;
lasers;
radiation effects
GODOY, B.M.; ARANA-CHAVEZ, V.E.; BORTOLI GROTH, E.B.; RIBEIRO, M.S.
Effects of low-intensity red laser radiation on the dentine-pulp interface after class I cavity preparation disfunction.
Brazilian Dental Journal,
v. 15,
p. 86-87,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32758. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
HAYPEK, P.; THEODORO, L.H.; BACHMANN, L.
; EDUARDO, C.P.; SAMPAIO, J.E.C.; ZEZELL, D.M.
.
Effects of the diode laser irradiation on root surfaces: thermal analysis.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 110-110,
2004.
Abstract:
The purpose of this study was to evaluate the temperature rising inside the pulpar cavity during the diode laser irradiation on the
root surface. Twelve single root teeth were used and their mesial
and distal surfaces were irradiated (808 nm, 400 m, 30 s), in a
continuous mode (CW) and in an switched mode (SW) (10 Hz).
The temperature rise was evaluated deppending with the power
used (0.4 W to 2.2 W). The temperature was monitorated with a
termopar (T) fixed inside de pulpar cavity during the irradiation.
In a second step two parameters was used in a SW (10 Hz). The
safety temperature was keep using the power: Group A - 0.9 W
(mesial ) and Group B - 1.08 W (distal). The results showed the
termal pulpar events (T) during the irradiation, based in an specific
relation with the power (P), like T= -0.4+3.7P in a CW and
T= -0.2+2P in a SW. The temperature rising during the irradiation
was 3.4±0.4ºC on Group A and 4.0±1.0ºC on Group B.
The irradiation mode and the power are much important to temperature
rise inside the pulpar cavity and the 0.9 W and 1.08 W
radiation on the root surfaces were safety.
Palavras-Chave:
semiconductor diodes;
laser radiation;
dentin;
temperature dependence;
teeth
HAYPEK, P.; THEODORO, L.H.; BACHMANN, L.; EDUARDO, C.P.; SAMPAIO, J.E.C.; ZEZELL, D.M.
Effects of the diode laser irradiation on root surfaces: thermal analysis.
Brazilian Dental Journal,
v. 15,
p. 110-110,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32749. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
NAKASONE, R.K.; RODRIGUES, C.R.M.D.; BUZALAF, M.A.R.; OLYMPO, K.P.K.; TANJI, E.Y.; RIBEIRO, M.S.
.
Effects of the low-intensity red laser radiation on the fluoride uptake in human enamel: a preliminary study.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 119-120,
2004.
Abstract:
Fluoride has been the most important preventive method on development
of the caries. This in vivo study evaluated the effects of lowintensity
red laser radiation on the fluoride uptake in enamel. Ten
healthy participants were recruited for this study. The two upper
central incisors of each volunteer were used and divided into 4
groups: group GC (control), which was untreated; group GF (fluoride),
which received topical acidulated phosphate fluoride (APF)
1,23% treatment for 4 minutes; group GLF (laser + fluoride), which
was irradiated with a low-intensity diode laser (l= 660 nm and dose= 6 J/cm²) with APF application after irradiation and group
GFL (fluoride + laser), which received APF before irradiation using
the same parameters as GLF. The determination of fluoride was
performed using a fluoride ion electrode after an acid-etch enamel
biopsy. The results showed a significant increase of the fluoride
uptake in enamel for groups GF, GLF and GFL when compared to
control group. Although a percentage increase of 57% was
observed for GLF with respect to GF, there were no statistical differences
among the treated groups. These findings motivate further
studies in order to introduce low-power laser associated to APF as
a protective method of dental caries.
NAKASONE, R.K.; RODRIGUES, C.R.M.D.; BUZALAF, M.A.R.; OLYMPO, K.P.K.; TANJI, E.Y.; RIBEIRO, M.S.
Effects of the low-intensity red laser radiation on the fluoride uptake in human enamel: a preliminary study.
Brazilian Dental Journal,
v. 15,
p. 119-120,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32766. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
ZEZELL, D.M.
; BEVILACQUA, F.M.; MAGNANI, R.; ANA, P.A.
; EDUARDO, C.P..
Fluoride incorporation and acid resistance of dental enamel irradiated with Er:YAG: atomic absorption spectrometry and spectrophotometry.
Brazilian Dental Journal,
v. 15,
Special issue,
p. 131-131,
2004.
Abstract:
Er:YAG effects on dental enamel surface regarding the resistance
to demineralization and the fluoride incorporation were
evaluated. 80 samples were divided into 8 groups: G1) control -
APF application; G2) conditioning with 37% phosphoric acid
and APF application; G3) irradiation with 250 mJ/pulse, 7 Hz,
31,84 J/cm2 (contact) and APF application; G4) irradiation with
200 mJ/pulse, 7 Hz, 25,47 J/cm2 (contact) and APF application;
G5) irradiation with 150 mJ/pulse, 7 Hz, 19,10 J/cm2 (contact)
and APF application; G6) irradiation with 250 mJ/pulse, 7 Hz,
2,08 J/cm2 (non-contact) and APF application; G7) irradiation
with 200 mJ/pulse, 7 Hz, 1,8 J/cm2 (non-contact) and APF application;
G8) irradiation with 100 mJ/pulse, 7 Hz, 0,9 J/cm2 (noncontact)
and APF application. All samples were immersed in 2,0
M acetic-acetate acid solution, pH 4,5 for 8 hours. The fluoride,
calcium and phosphorous ions were analyzed, by atomic absorption
spectrometry and spectrophotometry. Groups laser irradiated
before topic APF application presented better results than the
control. There was higher fluoride incorporation on G7 and G8.
Calcium and phosphorous analysis reveled a decrease on the
enamel demineralization on G2 and G3 groups. The Er:YAG
laser on irradiation conditions of this work is a promissory alternative
for the Preventive Dentistry.
Palavras-Chave:
dentistry;
enamels;
lasers;
laser radiation;
fluorides
ZEZELL, D.M.; BEVILACQUA, F.M.; MAGNANI, R.; ANA, P.A.; EDUARDO, C.P.
Fluoride incorporation and acid resistance of dental enamel irradiated with Er:YAG: atomic absorption spectrometry and spectrophotometry.
Brazilian Dental Journal,
v. 15,
p. 131-131,
2004.
Special issue.
Disponível em: http://repositorio.ipen.br/handle/123456789/32751. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
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O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.
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1. Portaria IPEN-CNEN/SP nº 387, que estabeleceu os princípios que nortearam a criação do RDI,
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clique aqui.
O Repositório Digital do IPEN é um equipamento institucional de acesso aberto, criado com o objetivo de reunir, preservar, disponibilizar e conferir maior visibilidade à Produção Científica publicada pelo Instituto, desde sua criação em 1956.
Operando, inicialmente como uma base de dados referencial o Repositório foi disponibilizado na atual plataforma, em junho de 2015. No Repositório está disponível o acesso ao conteúdo digital de artigos de periódicos, eventos, nacionais e internacionais, livros, capítulos, dissertações, teses e relatórios técnicos.
A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.
O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.